Geopolymer cement adoption in Canada · Geopolymer cement adoption in Canada A market-focused...
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Donald Lake, CEO Terra CO 2 Technologies Ltd. [email protected] 2019 Geopolymer cement adoption in Canada A market-focused approach
Transcript of Geopolymer cement adoption in Canada · Geopolymer cement adoption in Canada A market-focused...
Donald Lake, CEOTerra CO2 Technologies [email protected]
Geopolymer cement adoption in CanadaA market-focused approach
MePhD THESIS INDUSTRY
Long-term outlook of GP reagents?
Fly ashSlag
MK-750
Fe-MK-750
Synthetic Glasses
Simple “activation”Synthetic glass is a global solution!
Ferro-sialate:Great! If near a suitable deposit
CANADA
“Geosynthesis” – status quo in nature
Zeolite
New wide variety of feedstocks also builds one.g. GEOCISTEM, “synthetic lava”, “manufactured slag”
Volcanic rock
Minerals Glass Reagent
3 reagent types by Ca Content: Low (0-10% CaO)
Med. (10-20% CaO)
High (20-35% CaO)
Common RocksUnconsolidated SedimentsConcrete Dem. WasteSome Mine TailingsEtc.
Engineered Glassy Reagents?
Synthetic Glass Reagents
• Avoid many problems of mineralogy• Control over composition and reactivity• Tailored to purpose - reproducible
• Downside?• High T (but perhaps ½ energy can be recovered)
• Strategic Advantage• Control over production – reliable, local • Use waste materials (collect disposal fee)
Glass Considerations
•Composition•Structure
•Fineness, etc.
COMPOSITION: From OPC textbook
4th dimension needed for Na, K
STRUCTURE: define “glassy”, “amorphous”
Example Feedstocks• Demolished Concrete• Fluvial Sediment• Basalt
Demolished Concrete-based Reagent
Demolished Concrete-based Reagent
(Ca, Na, K) – poly(sialate-multisiloxo)
River Sediment-based Reagent
Fraser River, Vancouver, CanadaMillions of tonnes of sediment are disposed of annually.
Heat-cured geopolymer concrete bricks
Basalt-based glassy reagent
Heat test - 750°C – 2 hours
Portland CementPaste
Demolished Concrete Reagent (Ca, Na, K)-PSMS Paste(ambient cure)
River Sediment Reagent (Na, K)-PSMS Paste and Grout(heat cure)
Why high-temperature route?
• Simplicity• Mechanochemistry• Wet chemistry – sol-gel etc.
• Energy – 2-5 GJ
• Still no process CO2!
So when can we start pouring concrete?
Approval process for geopolymer concrete in Canada
Why? Market Size Paradox
If you have $ Billions in funding
Perhaps better to disguise GP reagent as “pozzolan”
Portland SCM
Geopolymer Reagent
Glassy Reagents
Purpose-made reagents may be the bridge from OPC world to geopolymer world.
Why bother with Portland SCM?
1. Global Impact: we need to displace Mt of OPC, immediately.
2. Political Pressure: low-CO2 cement.
Develop local capacity to support geopolymer cement when regulations catch up.
E- electric heat C – Coal heat G – Oxy-CH4
What next?• Certifying reagent as SCM
• Raising money for pilot plant in Vancouver, Canada
• Proving economics of process
